Recovery of uranium(vi) from aqueous solutions using a modified honeycomb-like porous carbon material

Researchers have focused their attention on environment-friendly adsorption materials to solve the energy shortage problem and guarantee the sustainable development of human society. For that matter, pomelo peel, which is a low-cost and universal biomass waste, can be used as an effective carbon sou...

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Published in:Dalton transactions : an international journal of inorganic chemistry 2017, Vol.46 (2), p.420-429
Main Authors: Zhu, Jiahui, Liu, Qi, Li, Zhanshuang, Liu, Jingyuan, Zhang, Hongsen, Li, Rumin, Wang, Jun, Emelchenko, G A
Format: Article
Language:English
Subjects:
Adsorbents
Adsorption
Aqueous solutions
Carbon
Nanowires
Particulate composites
Porous materials
Surface chemistry
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Summary:Researchers have focused their attention on environment-friendly adsorption materials to solve the energy shortage problem and guarantee the sustainable development of human society. For that matter, pomelo peel, which is a low-cost and universal biomass waste, can be used as an effective carbon source with a large specific surface area. In this paper, a novel composite adsorbent, consisting of a three-dimensional honeycomb-like porous carbon material and MnO nanowires (HLPC/MnO ), has been successfully synthesized using alkaline activation followed by a carbonization procedure at high temperatures and in situ growth of MnO nanowires. The as-prepared composite was characterized using XRD, FT-IR, XPS, SEM, TEM and BET. The surface area of the HLPC reached 1147.41 m g . The results of the adsorption experiments show that the highest adsorption value of the HLPC/MnO composite was 238.09 mg-U per g-adsorbent at pH 5. The thermodynamic and kinetic parameters demonstrate that the removal process correlates well with a Langmuir adsorption isotherm model and pseudo-second-order kinetic model. Thus, the HLPC/MnO composite is an excellent adsorbent for removing uranium(vi) ions from aqueous solutions.
ISSN:1477-9226
1477-9234
DOI:10.1039/c6dt03227c